Means for supporting and moving excavating-machines.



0, W. ROOD & 0. 0 JACOBS. MEANS FOR SUPPGRTING AND MOVING EXCAVATING MACHINES APPLICATION FILED PEB.3,1909.

1,086,466. Patented Feb. 10, 1914.

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drag-1w O. W. ROOD dz 0. O. JACOBS. MEANS FOR SUPPORTING AND MOVING EXOAVA'IING MACHINES.

APPLICATION FILED FEB. 8, 1909. 1,086,466. Patented Feb. 10, 1914..

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CHARLES W. R001), OF BRITT, IOWA, AND CHARLES C. JACOBS, OF AIVIBOY, ILLINOIS..

MEANS FOR SUPPORTING AND MOVING EXCAVATING-MACHINES.

a sence.

Application filed February 3, 1909. Serial No. 475 733.

T 0 all w/wm it may concern:

Be it known that we, CHARLES W. Room, a citizen of the United. States, residing at Britt, in the county of-Hancock and State of Iowa, and CHARLES C, JAcons, a citizen of the United States, residing at Amboy, in the eounty of Lee and State of Illinois, have invented a certain new and useful Improvement in Means. for Supporting and Moving Excavating-lvlachines, and declare the fol-- lowing to be a full, clear, and exact descript-i'on of the same, such as will enable others skilled iirt'lie art to which it pertains to 'make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The present invention relates to excavating machines or other heavy machines which it is necessary to move about and has for its object to provide a simple and ,etlicient arrangement whereby such machines may be readily moved from place to place under their own power even thoughthe soil over which they travel be soft andwet.

The present invention may-be regarded as comprising improvements on the apparatus disclosed in an application filed on even date herewith by Charles W. Rood, Serial No. 475,741.

The various features of novelty whereby our invention is characterized will hereinafter be pointedout with particularity in the claims; but, for a full understanding of our invention and of its object and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawings, wherein:

Figure 1 is a plan view of a machine or apparatus arranged in accordance with a preferred form of Your invention, the excavating machinery or other machinery which to be mounted upon the carriage being omitted; Fig. '2 is a side elevation of the apparatus showing the positions of the parts when a movement inone direction is desired, while Fig. 3 is a view similar to Fig. 2, showing, however, the parts in the posltions which they occupy for movements inth'e opposite direction; Fig. i is a plan parts of the machine and the supporting Specification of Letters Patent.

Patented Feb. 10, 1914 carriage for the excavator is adapted to rest upon and be moved across the track or tracks.

Referring to the drawings, A represents the carriage or platform upon which may be mounted excavating machinery or any other load.- The sides of the platform or carriage are preferably formed of heavy girders B through which the entire carriage and load may be supported.

C, C area pair of elongated track members lying beneath and parallel with the girders B, B. These track members may have any desired length and are preferably made of considerable width so as to engage with a large portion of the surface upon which the tracks rest or over which they move. The track members are preferably provided with rails 0. secured to orformed upon the upper sides thereof; and journaled beneath the girders are a number of wheels D which rest upon the rails so as to support cables which pass over sheaves or pulleys carried by the carriage and the tracks, respectively, in such a manner that, upon rotating the drum in one direction, a pull is exerted tending to retract the tracks and advance the carriage; while, in winding the drum .in the opposite direction, a pull is exerted which tends to advance the tracks and move the carriage backward. The drums are indicated at E, E. Secured at one end to each of the drums is a cable F which passes under a-pulley or sheave Gr revolubly mounted upon the carriage, thence under a pulley or sheave H loosely mounted upon a shaft-I extending transversely be tween two upright pedestals Kconnected with one'.of the tracks, thence around ,a pulley or sheave G arranged beside the pulley or sheave G and back to the shaft-II where the end of the cable is fastened. A second cable L is also connected at one end to the drum and then asses over 'a pulley or sheave H mountev upon the'shaft I,-

thence over a sheave'o'r' pulley M mounted upon the carriage near the drum, and then back to the shaft I where'the free end is Iio secured. It will be seen that when one of the drums is rotated so as to wind up the cable F,.the tendency will be to draw the members G and I together and, since these -members are mounted respectively upon the carriage and upon the track, a relative movement between the carriage and the "track when the 1 a direction whic track will be produced if the pull is great 'enough. The cables F and L are wound upon the drums in opposite directions so that when one of these cables is being wound the other is being unwound. When the drum is rotated so as to wind up the cable L the tendency is to bring the sheaves if and M closer together, 'this also eflecting a relative movement between the carriage and the pull is great enou h, but in 1 is just the opposite of that produced by Winding up the other cable.

, In order to control therelative movements of the tracks and carriage, so as to produce thereby a movement of'either in either di- .rection, we provide one or more friction shoes which, when properly positioned, will prevent the carriage from moving when it is desired to shift the track and at other times permit the carriage-to run along the track. In the arrangement shown there are two of these shoes N, N associated with each girder,

the shoes of each set lying on opposite sides of the track beneath the corresponding girder. These shoes are preferably long and wide and are connected to thecarriage in such a manner as to have two operative posiwhen the wheels of the carriage are resting upon therails the shoes will come into contact with the ground before the arms assume vertical positions.

' InFig; 2 the parts are shown in the positions wherein the supporting arms for the shoes lie upon the left of vertical planes passing through their points of connection with the girders. this position,

If, while the shoes are in it is attempted to push or pull the carriage toward the left, the friction between the shoes and the ground will prevent the shoes from traveling with the carriage and, if the carriage moves slightly while the shoes remain stationary, the supporting arms for he shoes will begin to swing about their :points of connection with the shoes.

The result-of this small swinging movement of the arms is to force the shoes more firmly against the ground and the movement of the carriage can continue only if the entire carriage is lifted sutiiciently to permit the arms to assume upright posltions and thereafter drop into the positions indicated in Fig. 3. It is evident that when the parts are in the positions indicated in Fig. 2, a rotation of the drums in a direction to wind up" the cablesF, and thereby producing a tendency on the part of the sheaves G and H to approach each other, will cause the tracks to move toward the right since the carriage is prevented by the friction shoes from moving in the other direction. As the cables become taut during this winding operation neither the carriage nor the tracks yield materially because the whole weight of the load is borne upon the tracks and an enormous frictional resistance would have to be overcome'in order to move the tracks over the ground. As soon as the cables become taut, however, the carriage begins to yield slightly, bringing the .arms 0 toward the upright positions and forcing the friction shoes firmly against the ground. It will be seen that any slight movement of the carriage which carries the supporting arms ever so little toward their upright positions transfers some of the weight of the carriage from the tracks to the arms and the shoes connected therewith, the arms now becoming supporting struts. The point will soon be reached where less effort is required to slide the tracks from beneath the carriage than to raise the carriage farther and thereupon the tracks will begin to move toward the right as long as the drums are rotated.

\Vhen it is desired to shift the carriage over the tracks toward the right the drums are turned in a direction opposite to that in a which they were previously turned. The tracks will now remain stationary since the entire weight of the carriage. and load is rested thereonand the carriage will move freely as long as the drums continue to rotate; this movement of the carriage being without interference on the part of the shoes since any slight resistance which the shoes encounter in their forward movement causes the arms which support themto assume positions of even greater inclination to the vertical than those indicated in Fig. 2, lifting the shoes and thereby overcoming the resistance. s

In order to make it possible to shift first the tracks and then the carriage toward the left, the brake shoes or friction shoes are brought into the positions indicated in Fig. 3, namely, positions wherein the supporting arms are inclined in the opposite direction from that shown in Fig. 2.- It will be seen that these shoes will now resist a movement of the carriage toward the right and therefore when the drums are rotated so as to produce a tendency of the carriage to move toward the right and on the part of the tracks to move toward the left, the carriage will remain Stationary and the tracks will move. Similarly when the drums are turned in the opposite direction so as to produce a tendency on the part of the tracks to move.

toward the right and on the part of the carriage to move toward the left, the tracks will remain stationary and the carriage will move over the tracks. I.

The drums may be driven in any suitable f manner and, where there is an en ine or be disconnected therefrom at other times.

so "larity only a single form of'our invention we do not desire to be llmlted to this parother power device mounted upon t e carriage, means may be provided for connect" ing the drums thereto. In the arrangement '15.

counter-shaft which is adapted to be conshown, P represents an engine and Q is a nected to the engine by means of a, friction clutch It, thepurpose of the friction clutch being to permit the counter-shaft to be connected to the engine when desired and to S, S are a pair of clutchesbetween the counter-shaft and the drums so that either or both of thedrums may. be clutched throu h the counter-shaft and driven thereby. y

providing clutches S, S,'i.t becomes possible, to driveeither drum independently of the other and therefore to shift one track at a time if desired. j I -While we have described with particuticular form for many changes may be made in the construction and arrangement of parts without departing from our invention as will be-evident from the'terms employed in the definitions of our invention constituting the appended claims,

Having now fully described our invention, what we claim as new and desire to secureby Letters Patent is: I

1. In combination, a track adaptedlto lie I upon the ground, a carria e mounted to run upon said track, a brake shoe restingupon the ground and connected to the carnage so as to havetwo operative positions in one of which it prevents forward movement of the carriage while" permitting backward movement and in the other of which it prevents backward movement of the carriage whilepermitting forward movement, and means adapted to produce relative movements between the carriage and the track Copies of this patent may be obtained'fer during one of which the carriage tends to -move forward and during the other of which the carriage tends to move backward.

2. In combination, a track adapted to lie upon the ground, a carriage mounted to run upon the track, an elongated brake shoe adapted to rest upon the ground longitudinally of the track, a plurality of .links pivoted at their ends to the shoe and to the carriage respectively, the length of the links being greater than -the vertical distance between the pivots of each link, and means arranged between the trackandthe carriage for exerting either a force tending to move the carriage backward ora force, tending to move-the carriage forward, the amount of the force being sufiicient to move thev track over the ground in one direction when the carriage is locked by the shoe against movement in the opposite direction.

4. In combination, a track -adaptedto lie upon the ground, a carriage having a pair of wheels torun upon said track, a pair of elongated shoes lyingon opposite sides of saidtrack, links pivot-ally connected at their ends to said shoes and to said carriage, the

length of said links 'beinggreaterthan the vertical distance between the pivots, and

means arranged between said track and said carriage for producing relative movements between the track and the carriage in opposite directions longitudinally of the track.

1 In testimony whereof, we sign this 'specification in the presence of twowitnesses.

' CHARLES. W. noon. CHARLES JACOBS.

Witnesses: V

G. BoHM,

0. H. Woosrnn.

five centsveach, by addressing the." Commissioner of Patents, Washington, 13.10. s I v 

